Charlie Hebdo shootings: Preventing future attacks

Terrorist attack in France
A woman with an umbrella holds a sign reading "Je suis Charlie" (I am Charlie) as European Parliament members hold a minute of silence at the European Parliament in Brussels on January 8, 2015, for the victims of the January 7 attack against French satirical weekly newspaper Charlie Hebdo which left 12 people dead.
EMMANUEL DUNAND/AFP/Getty Images

France was already on high alert before Wednesday's attack on a satirical newspaper.

The terrorist attack on Charlie Hebdo, carried out by masked gunmen, left 12 dead.

What will the country do to prepare for attacks going forward, and what things were already in place for just such an event?